<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <style>
        .item{
            width: 100%;
            height: 200px;
            background-color: aqua;
            margin-bottom: 20px;
        }
        .tab{
            width: 100%;
            height: 50px;
            background-color: beige;
            display: flex;
            align-items: center;
            justify-content: space-around;
            position: fixed;
                bottom: 0;
                left: 0;
        }
        .items{
            width: 100%;
            height: 200px;
            text-align: center;
            color: #fff;
            position: sticky;
                top: 10px;
            background-color: #333333;
        }
    </style>
</head>
<body>
    <div class="item"></div>
    <div class="item"></div>
    <div class="item"></div>
    <div class="items"> 粘性定位 </div>
    <div class="item"></div>
    <div class="item"></div>

    <div class="item"></div>
    <div class="items"> 粘性定位2 </div>
    <div class="item"></div>
    <div class="item"></div>
    <div class="item"></div>
    <div class="tab">
        <span> 首页 </span>
        <span>联系人</span>
        <span>发现</span>
        <span>我的</span>

    </div>
</body>
</html>